Mychem

Notes, explanations and resources for KS3, GCSE and A level Students of chemistry

Acids, Alkalis and pH

Background  ​ You should already know that: • some substances are acidic • the opposite of acidic is alkaline  • acids and alkalis can be harmful  • we can measure acidity or alkalinity using the pH scale Strong acids ​When an acid molecule ionises completely when in solution in water, it is regarded as a strong acid. It is said...
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Carboxylic Acids

Carboxylic acids can occur naturally : When alcohols are oxidised they can produce a type of acid known as a carboxylic acid.    one example of a carboxylic acid is ethanoic acid . This is also known as Acetic acid and is the acid found in vinegar. Other examples of carboxylic acids are methanoic acid ( also known as formic acid)  wh...
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Addition Polymers and condensation polymers

​Polymers are a very important group of compounds. Many organic ( carbon based)  molecules can be made to Polymerise. The word "poly" means many.  When a molecule is polymerised the ( usually short) monomer molecules join up with one another to form very long polymer molecules. Addition Polymerisation These two videos show ...
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Methane, Ammonia and Water

​The images in this slideshow here show how we can account for the way in which electrons are shared between atoms. This produces a full outer shell of electrons for the atoms involved and results in the formation of stable molecules.  Use the three buttons to the top to see three different representations of the molecules
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Reduction of iron

See iron being formed in this violent, reduction reaction.  Iron III oxide and Aluminium react with one another .  Pure iron is produced. Try to write word equations for this reaction  What is reduced in this reaction?  What is oxidised? Magnesium ribbon is used as the fuse. Main reaction  Fuse  reaction Symb...
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Particle Theory

This page will help discussion of the nature of matter ​This animation helps to explain the observations in the first video A look at the mathematics !
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